Method for partially regenerating catalyst for methanol and / or dimethyl ether-to-olefin and method for methanol and / or dimethyl ether-to-olefin

The use of a mixed gas of water vapor and air for partial catalyst regeneration addresses the inefficiencies of existing methods by enhancing catalyst selectivity and activity while reducing environmental impact and extending catalyst life.

EP3967400B1Active Publication Date: 2026-06-24DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
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Patent Information

Authority / Receiving Office
EP · EP
Patent Type
Patents
Current Assignee / Owner
DALIAN INSTITUTE OF CHEMICAL PHYSICS CHINESE ACADEMY OF SCIENCES
Filing Date
2019-05-10
Publication Date
2026-06-24

AI Technical Summary

Technical Problem

The existing regeneration methods for deactivated SAPO catalysts in methanol-to-olefins technology produce large amounts of greenhouse gas CO2 and fail to effectively control the residual coke content, leading to reduced catalyst activity and selectivity, and require high temperatures and long regeneration times.

Method used

A method using a mixed gas of water vapor and air to partially regenerate the catalyst, adjusting the coke content and maintaining catalyst activity by selectively removing coke deposits near active sites, enhancing the selectivity of light olefins.

Benefits of technology

The method improves the selectivity of light olefins and maintains high methanol conversion ratios, reduces greenhouse gas emissions, and extends catalyst life by controlling residual coke content, achieving up to 83% olefin selectivity and nearly complete methanol conversion.

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Abstract

Disclosed is a method for partially regenerating a catalyst for methanol and / or dimethyl ether-to-olefin. The method comprises: introducing a mixed gas into a regenerated region containing a catalyst to be regenerated, and subjecting same to a partial regeneration reaction to obtain a regenerated catalyst, wherein the mixed gas contains water vapor and air; and in the regenerated catalyst, the coke content of at least part of the regenerated catalyst is greater than 1%. The method utilizes the coupling of a mixed gas of water vapor and air to activate a deactivated catalyst, selectively eliminate part of a coke deposit in the catalyst to be regenerated, and obtain a partially regenerated catalyst for methanol-to-olefin. Another aspect of the present invention is that further provided is a method for methanol and / or dimethyl ether-to-olefin by using the partially regenerated catalyst for methanol-to-olefin regenerated by means of the method.
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